#include <iostream>
#include <conio.h>
using namespace std;

int main()
{

       int i;
       cin>> i;
       if (i>19)
       {
           switch (i/10)
           {

           case 2:cout<<"twenty ";
            break;
           case 3:cout<<"thirty ";
            break;
           case 4: cout<<"forty ";
            break;
           }
       switch (i%10)
       {
       case 1:cout<<"one\n" ;
           break;
       case 2:cout<<"two\n";
        break;
       case 3:cout<<"three\n";
        break;
       case 4: cout<<"four\n";
        break;
       case 5: cout<<"five\n";
        break;
       case 6: cout<<"six\n";
        break;
       case 7: cout<<"seven\n";
        break;
       case 8: cout<<"eight\n";
        break;
       case 9: cout<<"nine\n";
        break;
       }
       }
      else {
       switch(i)
       {
       case 10:cout<<"ten\n";
        break;
       case 11:cout<<"eleven\n";
        break;
       case 12:cout<<"twelve\n";
        break;
       case 13:cout<<"thirteen\n";
        break;
       case 14:cout<<"fourteen\n";
        break;
       case 15:cout<<"fifteen\n";
        break;
       case 16:cout<<"sixteen\n";
        break;
       case 17:cout<<"seventeen\n";
        break;
       case 18:cout<<"eighteen\n";
        break;
       case 19:cout<<"nineteen\n";
        break;
}
       }

getch();
    return main();
}
